Lock for door-knobs.



No. 797l37. PATENTED MIGIl 15, 1905o A. MARIUN. .LUCK FOR Doma KNoBs..

, APPLICATION FILED NOV. 29, 1904.

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Specification of Letters Patent.

Patented ug. 15, 1905.

Application filed November 29, 1904. Serial Nn. 234|74=1.

To all wir/0m, it may concern.:

Be it known that I, ARTHUR MARION, a citizen of the United States, residing at Fitchburg, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Locks for Door-Handles, of which the following is a specification.

My invention relates to improvements in iocks for door-handles and to that class of locks which are combined with handles or knobs which are adapted to be used on an ordinary door-latch-bolt mechanism to lock said bolt and in which a lock and key are not employed.

The object ol my invention is to improve upon the class of locks referred to., and more particularly to provide a rotatable kno b-spindle and knobs or handles adapted to be substituted for the ordinary rotatable knob-spindle and knobs or handles and applied to the ordinary latch-bolt mechanism to lock the latch-bolt or prevent its movement from one side of the door except by means of a detachable key or to unlock the latch-bolt, so that it may be moved from either side of the door, it' desired.

My invention consists in certain novel features of construction or' my improvements, as will be hereinafter fully described.

Referring to the drawing's, Figure lis a iront edge view oi a portion oi' a door having an ordinary latchbolt mechanism applied thereto and a rotatable knob-spindle and knobs or handles embodying my improvements combined therewith. Fig. 2 is a plan View and partial section of the knob-spindle and knobs, partially broken away, shown in Fig. l detached, looking in the direction of arrow a, same figure. Fig. 3 corresponds to Fig. 2, but shows the opposite or inoperative position of the lock-slide. A Fig. a shows the rotatable spindle detached. Fig. 5 is a section on line 5 o, Fig. 4f, looking in the direction ol" arrow same ligure. Fig. 6 shows the lock-slide detached. Fig. 7 shows a modified construction of the right-hand endof the knob-spindle shown in Fig. 2 and of the manner of attaching the knob thereto. Fig. 8 is a section on line 8 8, Fig. 7, looking in the direction of arrow c, same iigure. Fig. 9 corresponds to Fig. 7, but shows a modified construction; and Fig. 10 shows a modified construction of the left-hand end of the spindle shown in Fig. 4.

lin the accompanying' drawings, 1 is a portion of the edge of a door having a recess therein to receive the latch-bolt mechanism of ordinary and wellknown construction, with a front plate 2, secured to the edge of the door by screws 3, and a latch-bolt 4, which is connected with and moved by the turning ot' a rotatable knob-spindle in the ordinary and well-known way.

5 and 6 are plates or disks surrounding the rotatable knob-spindle and secured upon opposite sides of the door in the usual and wellknown Way.

l will now describe my improvements, which particularly relate to the rotatable knob-spindle and the knobs or handles secured to each end thereof; My spindle and knobs are adapted to be combined with and used on a door-latch-bolt mechanism of the type shown in Fig. l, in which there is no provision for locking the latch to prevent the opening or' the door from the outside.

In my improvements 7 is a rotatable spini dle, preferably comprising the two parts 7 and 7. (See Fig. 5.) The part 7 has a series oi holes c through one end and is adapted A to receive thereon the knob 8 on the inside of the door. Said knob 8 may be of any ordinary shape and made or' porcelain or other" material and is attached to the end oi the part 7 of the rotatable spindle 7 by a screw 8m, extending' through one of the holes L in said part 7 in the usual way. Through one side oit' the shank 8 or' the handle 8 is an elongated opening 8", through which extends and slides the bent end 9 on the lock-slide 9. (See Fig. 6.) The lock-slide 9 is adapted to tit loosely into and extend within a longitudinal recess or groove on one side or' the portion 7' oi the spindle 7 and to slide longitudinally there in. On the end of the bent end 9 of the lockslide 9 is pivotally attached a handle or engaging end l0, which may be moved on its pivotal connection and when the lock-slide is in its inoperative position, as shown in Fig. 1, is moved down to engage the plate 6 and prevent any accidental longitudinal movement of the slide 9. When the slide 9 is in its opposite or operative position, as shown in Fig. 3, the handle portion l0 is in the opposite position (shown in Fig. 3) to engage the inner side or surface oi' the knob and prevent any accidental longitudinal movement or' the slide 9. The part 7 of the rotatable spindle 7 corresponds in shape and external diameter to the part 7' and is rotatably mounted on a pin 11, the inner end or' which extends into an opening in the end of the part 7 and is secured therein by atransverse pin 11. (See Fig. 5.) The part 7 of the rotatable spindle 7 is adapted to rotate loosely on the pin 11 and is prevented from having longitudinal motion thereon by the end of the part 7 of the spindle 7 and an enlarged portion 11H on the pin 11.

One side or face of the part 7H has a longitudinal groove or recess therein corresponding to the groove or recess L in the part 7 and is adapted to receive the end of the lock-slide 9 when it is moved inwardly, as shown in Fig. 3, to secure the partI 7H to the part 7 and cause the two parts to rotate together, so that the latch 4 may be turned from either side of the door.

Upon the part 7 of the lrotatable spindle 7 is secured the shank 12 of a knob 12, corresponding to the knob S. The shank 12/ of the knob 12 is preferably rigidly secured to the part 7 of the rotatable spindle 7 by means of a rivet or pin 13, which extends through a hole in the shank 12 and through a transverse opening c in the part 7 and is headed at each end to prevent the removal thereof. The handle 12 has a central opening 12 therein adapted to receive the 4straight end of a key 14, which may have a square opening at its inner end adapted to fit on the square projecting end 11'H on the pin 11.

In Fig. 7 is shown a modified construction of the rotatable spindle 7. In said ligure the rotatable spindle 7 is made in one part with a rounded end and has a longitudinal groove b therein corresponding to the longitudinal groove in the spindle 7. The shank 12m of the knob 121 is loosely mounted on the rounded end of the spindle 7 and is retained in position thereon by means of the annular shoulder 7 U on the end of the spindle 7a extending within an enlarged recess 12W within the shank 12a. The shank 12al has within its inner end a series of recesses 12m", adapted to register with the longitudinal recess Z2" in the spindle 7, (see Fig. 8,) so that the longitudinal movement of the lock-slide 9 to carry the end thereof into any one of the recesses 12W in the shank 12a" will lock said shank to the spindle 7a to cause it to turn with said spindle. The knob'proper, 12a, is secured to the shank 12E" after the spindle 7 n has been inserted through said shank and is provided with an opening`12" therein to receive akey to engage the square end 7a" of the spindle 7 and turn the spindle independently of the handle 12ll when the lock-slide 9 is not in engagement with one of the recesses 12ml in the shank 12u.

Fig'. 9 shows another modified construction of the rotatable knob-spindle 7 and the manner of attaching the knob thereto. In said Fig. 9 the spindle 7b corresponds to the spindle 7 l in Fig. 7 and the shank 12"/ corresponds to the shank 12; but the spindle 7 b has an annular groove 7l therein to receive the inner end of two rivets or pins 13, which extend through openings in the shank 12' to secure the shank loosely to the spindle 7". The end 7MH of the spindle 7" is threaded to receive a threaded hole in a key by which said spindle is turned independently of the handle 12b when the lock-slide is not in engagement with one of the recesses 12b" of the shank 12W.

In Fig. 10 is shown a modified construction of the spindle 7. In order to increase the length of the spindle for a thicker door, I provide a supplemental piece (Z, forming the end of the spindle, which is secured to the end of the part 7 of the spindle by a screw CZ' on said piece screwing into a screw-threaded hole in the end of said part 7.

From the above description in connection with the drawings the operation of my improvements will be readily understood by those skilled in the art.

The ordinary rotatable spindle having knobs thereon is removed from the latch-bolt mechanism of Ordinar y construction (shown in Fig. 1) and a rotatable spindle and knobs of my improved construction are substituted therefor.

Then the lock-slide is moved outwardly and locked in position, as shown in Figs. 1 and 2, the outer knob 12 will be free to turn on the spindle 7 and the latch 4 will be locked. In order to turn the spindle 7 and move the latch 4 to open the door, it will be necessary to apply a key, as 14, through the central opening 12" in the knob 12, Figs. 1 and 2, to fit onto the end 11 of the pin 11 and turn the same, and with it the part 7 of the spindle 7, to move the latch 4 independent of any movement of the handle 12.

In the construction of the spindle (shown in Figs. 7 and 8) the key is applied directly to the end of the spindle to rotate the same independently of the knob.

Then it is desired to have the outer handle 12 move the latch 4 in the ordinary way, the lock-slide 9 is moved inwardly to cause the inner end thereof to extend into one of the grooves in the part 7 of the rotatable spindle 7 or into the groove in the shank of the knob (shown in Figs. 7 and 8) to secure the portion 7 of the spindle 7 or the shank of the knob (shown in Figs. 7 and 8) together, so that the turning of the handle 12 will turn the knob-spindle, and with it the latch 4, all as will be fully understood by those skilled in the art.

It will be understood that the details of construction of my improvements may be varied, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a door-latch mechanism, means for moving the latch, and for preventing the moving of the latch from one side of the door, comprising a rotatable handle or knob-spindle made in two parts connected together, a knob secured on the end of one part and having a longitudinal opening through one side of its shank, a lock-slide adapted to extend into and slide in a longitudinal recess in the spindle, with one end extending through said longitudinal opening, and having a handle attached thereto on the outside of the shank, and adapted to move in the direction of the length of said shank, a knob secured on the other part of the spindle, and having an opening therein for a key to engage and rotate the spindle to move the latch independently of any movement of the knob or handle, substantially as shown and described.

2. ln a door-latch mechanism, means for moving the latch, and for preventing the moving of the latch from one side of a door, comprising a rotatable knob-spindle with a knob on each end, one knob secured to the spindle to turn with it, and the other knob adapted to turn independently of the first-mentioned knob, a lock-slide adapted to be moved longitudinally ina recess in the spindle, to cause the two knobs to turn together, or to turn separately, and means for moving said slide, and locking it in its two extreme positions, comprising a handle pivotally attached to said slide on the outside oi' the shank of the knob, and adapted to move in the direction of the length of said shank, and to engage the inner face of the knob, or the plate on the knobspindle, substantially as shown and described.

3. In a rotatable knob-spindle for a doorlatch mechanism, the combination with the spindle proper, of a supplemental and detachable end, adapted to be secured thereto to increase the length o1 the spindle, substantially as shown and described.

ARTHUR MARION.

Witnesses:

J. C. DEWEY, M. HAAs. 

